Combined bathtub and shower stall



FIG. 1 is a perspective view taken from the top front and right side of a combined bathtub and shower stall showing my new design;

FIG. 2 is a perspective view taken from the top, front and left side thereof;

FIG. 3 is a top plan view thereof; and,

FIG. 4 is a front elevational view thereof. 

The ornamental design for a combined bathtub and shower stall, as shown and described. 